Calligan Creek Hydroelectric Project
King County, Washington · EIA plant ID 60418 · Operator: PUD 1 of Snohomish County
Nameplate6MWSummer 7 MW
Generators1in service
Net generation13GWh12 mo to Dec 2025
Capacity factor21%hydro units, summer MW
Heat rate—thermal plants only
First online2018
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2017 | 0 | — | — |
| 2018 | 11.7 | 24.3% | — |
| 2019 | 11 | 20.9% | — |
| 2020 | 19.3 | 36.5% | — |
| 2021 | 19.5 | 37.1% | — |
| 2022 | 3.9 | 7.4% | — |
| 2023 | 9.4 | 15.3% | — |
| 2024 | 17.2 | 27.9% | — |
| 2025 | 12.6 | 20.6% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| CC6MW | Conventional Hydroelectric | HY | 6 | 7 | Feb 2018 | Operating | — | coming soon |
Owner / operator
Operator: PUD 1 of Snohomish County. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PUD 1 of Snohomish County | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| Hancock Creek Hydroelectric Project | 6 MW | 3.2 km |
| Black Creek | 4 MW | 11.3 km |
| Snoqualmie | 13 MW | 13 km |
| South Fork Tolt | 17 MW | 13 km |
| Snoqualmie 2 | 39 MW | 13.1 km |
| Twin Falls Hydro | 24 MW | 17.4 km |